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UUID Generator

Generate, validate, and inspect universally unique identifiers

Time-based

UUID V1

49124d10-6765-11f1-9e18-8d8ba590900c
Random

UUID V4

f34e3dad-e17e-40e7-a243-844f338be201
Name-based

UUID V5

ce8cc499-7aa9-52f8-99d5-bf8554f7a01c

Batch Generator

Version

UUID Validator

Paste a UUID to check if it's valid and identify its version.

UUID Versions Explained

Version 1

Uses the current timestamp and MAC address. Guarantees uniqueness but may expose hardware identity.

Version 4

Purely random. The most commonly used version — simple, private, and virtually zero collision probability.

Version 5

Derived from a namespace + name using SHA-1. Deterministic: the same inputs always produce the same UUID.